Piercing-punch and die



E.' IBACH.

PIERCING PUNCH AND r V APPLICATION FILED DEC. 28, 1,338,082; Patented Apr. 27,1920.-

35 B T M 71 I 30 I5 I wuentot l 22217 mac/2 UNITED s'r 'rEs PATENT OFFICE.

EMIL IBACH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO BUDD WHEEL CORPORATION, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF VIRGINIA.

PIERCING-PUNGH AND DIE,

Specification of Letters Patent. Patented Apr. 27,1920.

Applicationflled December 28, 1918. Serial No. 268,641.

To all whom it may concern Be it known that I, EMIL IBAcH, a citizen of Germany, who have declared my intention to become a citizen of the United States, residing at Philadel hia, in the county of Philadelphia and tate of Pennsylvania, have invented certain new and useful Improvements in Piercing-Punches and Dies, of which I declare the following to be a full, clear, and exact description.

The present invention relates to an im proved punch press particularly adapted for punching holes in the rims of wire wheels, which, as is well known in certain types of construction, are located at an angle to the base or channeled portion of the rim in order to receive the wire spokes at the proper angles to the plane of the wheel.

tread. It is to be understood, however, that this invention in its broad concept 'is not limited to the manufacture of wire wheels,

but has a wide range of use wherever a mechanism of the character may be adapted articles. V

The objects of the invention are to prO- vide a novel arrangement for locating the articles in the punch press, for punching a hole therein preferably at an-angle to a portion of the article, as supported in the punch press, although not necessarily limited to the angular arrangement, and then upon a removal from the article of either the punching or die element of the press depending on which is moved, to provide means for stripping or removing the article from the punch after the opening has been punched therein.

Further objects of the invention are to provide a novel arrangement for punching the, holes at an angle to the rim of a Wire wheel construction, providing, in a simplified punch construction, a support adapted to hold the rim at an angle whereby when a press is operated the opening punched therethrough will be made at an angle to the body portion of the rim of the wheel, a further feature being to facilitate punching the holes when adjacent the rim flanges.

In order to meet with commercial require-' ments, Wire wheels must conform to the standard set by The-Tire; Rim Association,

and these standards require, that a space of a certain width must be left at the center of the rim, which shall be uninterrupted,

' except for the valve stem hole, and the spoke seats or depressions, must not encroach upon th1s space or safety zone. a In clencher rlms of certain slzes, it 1s difficult to punch the holes for the spokes, through the opening in the article, to provide a novel arrangement for insuring independently of the means just referred to, a proper return to normal position of the article support or stripper mechanism after one operation to properly position the mechanism for the next punching operation.

Further objects of this invention relate to economies of manufacture and details of construction as will hereinafter appear from the detailed description tofollow. I accomplish the objects of my invention in one instance by the devices and means described in the following specification, but it is evident that thesame may be varied widely without departing from the spirit and scope of the invention as is'pointed out in the appended claims. Structures constituting certain embodiments of my invention, one of which may be the preferred, are illus trated in the accompanying drawings forming a part hereof, in which:

Figure I is an elevational view of'one embodiment of the punching-press.

Fig. II'is a sectional view taken on the line 2-2; of Fig. I, showing the normal position of the operative parts of the mechanism. l

Fig. III is a sectional view similar to Fig. II, showing the punching position ofthe operative parts of the mechanism.

Fig. IV is a sectional view taken on the line IV-IV of Fig. II.

Fig.- V is a sectional view of a modification of the invention.

- Referring to the drawings, it will be seen that there ilS shown a support :or stand 10 of the press or punching machine, having a horizontally extending upper arm 11 which receives the reciprocating press member 12. Although not essential to the invention,

preferabl the 'die of the punching-press 13 is carrie by the press 12 and is reciprocated while a punch 14 is made a stationary member and operated upon to cause the.

punching operation. One suitable means for mounting the punch 14 consists in supporting the same in a horizontally extending horn 15 suitably positioned within the stand 10 of the machine in' any desired manner, as by that illustrated in the drawing, wherein a mandrel 16 extends in an opening 17 in the standard and suitable means are provided for preventing rotation of the horn 15. To this end the support 10 is provided with a groove 18 within which fits a squared retaining member 19 secured to the horn 15 by means of the bolts 20, for example. The squared edges of the lock 19-fit within the groove 18 which has the parallel sides as shown, in order to rigidly maintain the horn 15 in the standard of the press against rotation or movement. The punch 14 is adjustable adjacent the outer edge or portion of the horn 15 and any means for adjustably supporting the punch in the horn 15 may be provided. The means illustrated herein consist in locating the same in an opening 26 in the horn 15, and providing the screw' bolt 27 through the end ofthe horn 15- and adapted to engage the punch 14 and hold the same securely in position. It will thus be seen that the punch 14 is adjustably mounted in the punching press.

One form of support for the articles to be operated upon anda mechanism for strip-' ping the same from the punch after a punchlng operation has been performed, consists in providing a movable support 30, this sup-- port, in the particular punching machine designed herein, being provided with an inclined base 31 adapted to receive the rim of the wheel.

The support 30 is provided with an open-- ing 32 therethrough, through which the punching point 14 of the punch freely extends, the support 30 being adapted to slide over the punch as will hereinafter appear. Between the support-30 and the horn 15 is located mechanism 'forreturning the support to normal position and stripping the article oif the punch after a punching operation' has been performed. One suitable mechanism for performing this function consists in providing an arm 35 pivoted at 36 to a support 37 suitably secured as by the screw bolt 38 to the horn 15. The stripper 35 isprovided with an opening 39 therethrough, adapted toreceive a stop device secured in the horn 15for1'rring means to limit the return of the stri pe to normal position. su table arrangement therefor consists in a boltl40 screw threaded into the horn 15, as shown, the bolt 40 passing through the opening 39 in the stripper 35. The horn 15is provided with a recess 41 \35 and support 30' adapted to receive a coil spring 42, which bears on one end against the bottom of the recess'41, and on the other end against the bottom of the stripper 35. The spring operates to return the support or stripper to normal position and remove the article from As the die 13 operated by suitable mechanism of this machine, (not shown) is returnedafter a punching operation to a cer; tain set position, this operation may be utilized, if desired, to additionally insure the returning of the support 30 to normal position and the stripping of the article off the punch 14. Thus, I have shown in the .drawings a strap 45 connected at 46 bythe bolts 47, to the stripper arm 35; the strap 45 extending upwardly to a point adjacent theoverhanging. arm 11 of the standard. The press 12 may be provided, if desired, with an extension, such as the plate 48 rigidly secured by means of the bolt 49 to the lower surface ofthe press 12, the extension 48 being so located as to engage the strap 45 and insure the raising of the stripper 35 to proper normal position. The plate 48 is preferably provided with an adjustable stud 50 screw threaded into the end of the plate and held in adjusted position by the nut 51. Thus the contact of the plate 48 through thestud 50 with the strap 45 may be properly adjusted with relation to the adjustable stop 40 and timed with the operation of the punch to insure the proper return of the stripper 35 and support to normal position. It is to be understood that the additional means in the strap 45v and the projection 48 on the press for insuring the stripping of the article from the punch 14 and the return of the support 30 to nor- 'mal position may be entirely omitted, if de- .particularly for quantity production and the punching of a large number of holes in a minimum amount of time. I

The operation of the improved mechanism described will, it is believed, be readily understood. It will be seen that the rim of the v wheel A with its clencher edge or flanges B may be readily positioned on support 30 in an inclined hole therein even adjacent a flange. After the article has properly been I positioned on support 30, the press is operated and upon a descent of the ress member 12, die 13 engages the base the rim A carrying the same, together with the support '30 and the stripper arm downwardly, thus forcing the punch 14 through the base of the channeled rim A of the wheel. It is to be understood that the moving parts of my improved type of punching-press could be readily reversed and the punch moved while the die remains stationary. It is further apparent that various other specific detailed construction of the several cooperating parts of the mechanism described could readily be varied, as may be deemed'desirable, expedient or necessary by any person skilled in the art, and the details described herein, while particularly coiiperating in the arrangement shown, and particularly effective and efficient in operation, however, are not essential to the operation of the 1nvent10n I or a reduction to practice thereof in its broad concept.

In the modification of the invention illustrated in Fig. V it will be seen that instead of using the coiled spring 42, I have shown a rubber block 55, capable of being compressed and expanding, interposed between the movable member 35 and the horn 15. A

suitable arrangementfor this structure consists in providing a recess 15? in the horn 15 extending an distance deemed necessary, and be ma e of any desired size, receives a rubber block 55 made of any character of rubber-or other flexible material adapted to be compressed as the press and punch die descend over the punch and force down the support 30, and the movable arm 35. Upon a return of the press away from the punch, "the block 55 immediately expands, returning the movable elements 35 Fig. Vathe "auxiliary secondary means for..

with the support 30 thereon to normal posit1on, and stripping the article, such as the wheel rim A off the punch 14'.

It will be; further noted that in the 'em- 7 bodiment of my invention-illustrated in insuring a return of the-arm 35and support,30 to normal position is not shown as certain embodiments of. my invention may be madein which it is not deemed unnecess'ary to-providethe extra return mechanism or stripper operating means shown in Figs. Iand IV. It is also evident from the two modifications] of my invention disclosed herein thatseveral other modifications and embodiments thereon may readily be made without departlng from the scope and spirit of the invention, consisting in a novel, simplified arrangement of punching element in a punching press for facilitating the production of articles in large quantities under efficient production methods.

I While I .have. described my invention in more orless detail and as being embodied in certain precise forms, I do not, therefore, desire or intend to be limited thereto, since as already stated, my invention contemplates broadly all proper changes as well as the omission of immaterial elements and the substitution and equivalents therefor, the making integral of certain parts shown herein as separate pieces, and other changes as circumstances may suggest or render expedient.

Having thus described my invention, what I desire to secure by Letters Patent of the United States and claim is:

1. In a machine of the class described, in combination, a die, a punch, a support extending between said die and punclr for holding an article in an inclined positlon between said die and said punch, and means for causing a relative movement between said die and punchto force the punch through the article and form an open ng therein at an. angle to a plane portion thereof.

2. In a machine of the class described, the combination of a die, a punch, a support-extending between said die and punch for holding an article in an inclined position between said die and said punch, means for causing a relative movement between said ,die and punch to force said punch through the article and form an opening therethrough at tin angle to a plane portion thereof, and means to strip the article from said punch after the completion of said punching operation.

3.'In a machine of the class described the- 4. In a machine of the class described, the

combination of a movable die, a stationary punch, a movable support. for holding an article in-an inclined position between said die and said punch, means to move said die toward said punch to move said support to force said article over' said punch, and

means to return said support and article to normal position after the operation of punching of a hole' in performed. v

5.-In combination, a movable die, a

the article has beenpunch, a movable support for positioningan article over said punch, means to move said support in one direction, upon an operation of the machine to cause the die to force said article over said punch, and means to return said support-to normal position after a punching operation has been performed. l

6. In combination, a movable die, a stationary punch, a movable support for positioning an article over said punch, and between said die and said unch, means to move said support in-one irection upon an operation of the machine to cause said die to force the article over said punch, means 0 return'said-support and artlcle to normal position removed from said punch, and se arate means cooperating between said 16 e and said support for insuring a returnof be moved when said press is operated tocause said die to force. the. article in the machlne oversaid punch, and form an opencarried thereby, a stationary horn and punch, a movable article support and strip.- .per carried by said horn and arranged to ing therethrough, 'a spring interposed between said horn and said support and stripper for returning'the same to normal position, and means carried by said press engag-- ing an element associated with said movable sup ort and stri per for insurin a return of t e latter mec anism to norma position.

9. In a device of the class described, in combinatlon, a movable press, a die carried thereby, a stationary horn and a punch, a movable article supporting stripper sup ported on said horn and arranged to e moved when said press is operated to cause ,said die to force an article in the machine over said punch, and form an opening therein, a spring interposed between said horn and said support for returning said support to normal positiom an'd a sto :for limiting "the return movement of sai support andstripper. 10. In scribed, the combinationof a movable press,

a die carried thereby, a movable article support and stripper, supported in the machine and arran ed to be movedi-when said press is operate to cause said die to force said article over said punchand form an-opensaid snpport.

a machineof the character desaid article.

ing therethrou h, means to return said support to norma position, an adjustable stop for limiting the. operation of said means, and adjustable means carried by said press for cooperating with an element associated with saids'tripp'er to'insure a return of said stripper and support a ainst said stop.

11. In a machine 0 the character 'described, in combination, a die, a punch, a a movable article support and stripper ar- '75 ranged to be moved when said press is operated to cause a relative movement between said die and punch to force an article located on said support over the punch and form an opening therethrough, a pivoted stripper arm cooperating with said-support and moved thereby in one direction, and means acting on said stripper arm for re-- turning the same and said support to normal position to remove the article from the punch after performance of the punching operation thereon.

12. In a machine of the character described, the combination of a punch, a die, an article support between said die and said punch, a pivoted arm cooperating with said support, for moving said support in one direction, anelement secured-to said member between the pivot thereof and said support adapted to extend in the line of movement 95 between said-die and said punch, and means for'cooperating with said element to move .said pivoted arm to normal position upon the operation of the machine in amanner set forth. I

13. In a machine of the classdescribed,

the combination of a press, a die carried by I said press, a horn supported from said ma chine, an article support and stripper II10V ably carried by said horn, said support havmounted on said horn and extending through 14. In a mac ne o f the character de I 1 scribed, the com ination of an operating adapted to extend-th'rough1-said opening, means operative 'upon an operation ofthe machine to force said article and support over said punch, andform an opening in the article, and means to return said support to normal 'sition. v

"15. In a mac he of the class described, '120 in combination, a die, a punch, a support for holding'an article in an inclined position between 7 said die and said support, said punch extending through said support, and means 'for causlng a relative movement be tweensaid die and said punch to move said support over said punch and force the unch through-the article and form an opening therein atan angle to a plane portion of 105 ing an opening therethrough, a punch i 16. In a punching, machine of 'the character described, the combination of a supsupport having'an opening therethrough to v and said die, said article support having an .receivesaid punch, means ticle and support-over saidpunch upon an to A movesaid aroperationof said die, and means to return said article and support to normal position in timed relation to the removal of the die from the ,punch for the purposes set forth.

17. In a machine of the class described,

the combination of a reciprocating-, die, a

. stationary horn, an article support carried by said horn and extending between said horn and means for causing a rel Op i g 18.1 n a machine of the class described, the combination of a die and punch, an article support'having a surface inclined at an angle to the plane perpendicular tothe common ax s of the dieand port having an opening therethrough and said punch extending through said opening,

ative movement between said die and punch to force the punch through thearticle and \fiorm an opening therein at an angle portion thereof.

punch, said supto the plane" therethroug h,and a punch mo'unted on said horn ande'xtending throughsaid openi r In testimony whereof, I ailix signature.

EMIL IBAGH. 

